The correct size of a nickel is 21.21 millimeters. Based on that, the data can be summarized into the following table: Too Small Too Large Total
Low Income 19 21 40
High Income 19 16 35
Total 38 37 75

Based on this data:
a. The proportion of all children that drew the nickel too small is:

Assume that this proportion is true for ALL children in an entire population (e. g. that this proportion applies to any group of children), and that the remainder of the questions in this section apply to selections from the population of ALL children.

b. If 5 children are chosen, the probability that exactly 3 would draw the nickel too small is:
c. If 5 children are chosen at random, the probability that at least one would draw the nickel too small is:
d. If 100 children are chosen at random, it would be unusual if more than drew the nickel too small